Crabs mate in the early summer and in the fall. It is important for crabs to mate when the female crab has recently molted and her outer shell is soft. If the female's shell is no longer soft, the crabs are unable to mate successfully. Before the female molts, she releases chemicals that attract male crabs to come and mate with her while there is still enough time.Know More
Female crabs enter maturity by molting after attracting male crabs. These attracted male crabs often fight with one another in order to win over a female crab. As part of a mating ritual, the male crab stands on the tips of his legs and sways around from side to side. If he is accepted by a female who is about to molt, the male carries the female for several days until she is ready to molt.
After the outer shell has been shed, the two crabs mate. This process can take several hours and the females keep the males' sperm in a sac until they are ready to fertilize their eggs later on. The fertilization usually occurs during migration season. Sometimes, male crabs continue to carry and cradle female crabs after they have mated to ensure the female does not mate again while her new shell is still soft.Learn More
Hermit crabs molt, or shed their skin, once a year as a part of their regular growth cycle. During the molting process, a hermit crab may bury itself in the gravel or sand and stay there for a few weeks to shed its exoskeleton and to grow a new one.Full Answer >
The lifespan of a crab varies according to species. A blue crab lives one to eight years, while a hermit crab lives 30 to 70 years. The Dungeness crab lives up to 10 years, and the horseshoe crab lives up to 20 years or more.Full Answer >
Crabs have a split nervous system that consists of a dorsal ganglion, which is the crab's brain, and a ventral ganglion. A circumesophageal ganglion connects the two parts. The crab's brain is situated between its eyes, while the ventral ganglion is underneath its organs and between its legs.Full Answer >
Crabs usually eat algae. Crabs are omnivorous, meaning that they will eat both plants and other animals for sustenance.Full Answer >